/*-------------------------------------------------------------------------
 * drawElements Stream Library
 * ---------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Stream copying thread
 *//*--------------------------------------------------------------------*/
#include "deStreamCpyThread.h"

#include <stdio.h>
#include <stdlib.h>

void cpyStream (void* arg)
{
	deStreamCpyThread* thread = (deStreamCpyThread*)arg;
	deUint8* buffer = malloc(sizeof(deUint8) * thread->bufferSize);

	for(;;)
	{
		deInt32 read	= 0;
		deInt32 written	= 0;
		deStreamResult readResult = DE_STREAMRESULT_ERROR;

		readResult = deInStream_read(thread->input, buffer, thread->bufferSize, &read);
		DE_ASSERT(readResult != DE_STREAMRESULT_ERROR);
		while (written < read)
		{
			deInt32 wrote = 0;
			deOutStream_write(thread->output, buffer, read - written, &wrote);

			/* \todo [mika] Handle errors */
			written += wrote;
		}

		if (readResult == DE_STREAMRESULT_END_OF_STREAM)
		{
			break;
		}
	}

	deOutStream_flush(thread->output);
	free(buffer);
}

deStreamCpyThread* deStreamCpyThread_create (deInStream* input, deOutStream* output, deInt32 bufferSize)
{
	deStreamCpyThread* thread = malloc(sizeof(deStreamCpyThread));

	DE_ASSERT(thread);
	DE_ASSERT(input);
	DE_ASSERT(output);

	thread->input		= input;
	thread->output		= output;
	thread->bufferSize	= bufferSize;
	thread->thread		= deThread_create(cpyStream, thread, DE_NULL);

	return thread;
}

void deStreamCpyThread_destroy (deStreamCpyThread* thread)
{
	deThread_destroy(thread->thread);

	free(thread);
}

void deStreamCpyThread_join (deStreamCpyThread* thread)
{
	deThread_join(thread->thread);
}
